This British Standard, having been prepared under the direction of the Technical Sector Board for Building and Civil Engineering B/-, was published under the authority of the Standa
Trang 1BRITISH STANDARD BS EN
317:1993
Particleboards and
fibreboards —
Determination of
swelling in thickness
after immersion in
water
The European Standard EN 317:1993 has the status of a
British Standard
UDC 674.03:674.815:674.817:620.192.53
Trang 2This British Standard, having
been prepared under the
direction of the Technical Sector
Board for Building and Civil
Engineering (B/-), was
published under the authority
of the Standards Board and
comes into effect on
15 April 1993
© BSI 07-1999
The following BSI references
relate to the work on this
standard:
Committee reference B/541
Draft for comment 90/16001 DC
ISBN 0 580 21136 3
Cooperating organizations
The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries:
Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y
France Association française de normalisation Germany Deutsches Institut für Normung e.V
Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland
Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portuguès da Qualidade Spain Asociación Española de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige
Switzerland Association suisse de normalisation United Kingdom British Standards Institution
Amendments issued since publication
Trang 3BS EN 317:1993
Contents
Page
National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-reference Inside back cover
Trang 4ii © BSI 07-1999
National foreword
This British Standard has been prepared under the direction of the Technical Sector Board for Building and Civil Engineering and is the English language
version of EN 317:1993 Particleboards and fibreboards — Determination of
swelling in thickness after immersion in water, published by the European
Committee for Standardization (CEN)
EN 317 was produced as a result of international discussion in which the UK took
an active part
The principle of the method is technically equivalent to A.7 of BS 1142:1989
Specification for fibre building boards and to clause 19 of BS 5669-1:1989
Particleboard — Part 1 Methods of sampling, conditioning and test, both of which
will be withdrawn in due course
A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application
Compliance with a British Standard does not of itself confer immunity from legal obligations.
Summary of pages
This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover
This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover
Trang 5EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
EN 317
February 1993
UDC 674.03:674.815:674.817:620.192.53
Descriptors: Particleboard, fibreboard, cement-bonded particleboard, test method, swelling in thickness, immersion test
English version
Particleboards and fibreboards — Determination of swelling in thickness after
immersion in water
Panneaux de particules et panneaux
de fibres — Détermination du gonflement en
épaisseur après immersion dans l’eau
Spanplatten und Faserplatten — Bestimmung der Dickenquellung nach Wasserlagerung
This European Standard was approved by CEN on 1992-12-15 CEN members
are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a
national standard without any alteration
Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any
CEN member
This European Standard exists in three official versions (English, French,
German) A version in any other language made by translation under the
responsibility of a CEN member into its own language and notified to the
Central Secretariat has the same status as the official versions
CEN members are the national standards bodies of Austria, Belgium,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
United Kingdom
CEN
European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung
Central Secretariat: rue de Stassart 36, B-1050 Brussels
© 1993 Copyright reserved to CEN members
Ref No EN 317:1993 E
Trang 6© BSI 07-1999 2
Foreword
This European Standard was prepared by Working
Group 1 “Particle-boards” (Secretariat: Germany)
and Working Group 3 “Fibreboards”
(Secretariat: Italy) of Technical Committee
CEN/TC 112 “Wood-based panels”
(Secretariat: Germany)
This standard is one of a series specifying methods
of test for determining the properties of
particleboards and fibreboards
No existing European Standard is superseded
This European Standard shall be given the status of
a national standard, either by publication of an
identical text or by endorsement, at the latest by
August 1993, and conflicting national standards
shall be withdrawn at the latest by December 1994
In accordance with the CEN/CENELEC Internal
Regulations, the following countries are bound to
implement this European Standard:
Austria, Belgium, Denmark, Finland, France,
Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal,
Spain, Sweden, Switzerland, United Kingdom
Contents
Page
Annex A (informative) Bibliography 5 Figure 1 — Test piece for the measurement of
Trang 7EN 317:1993
1 Scope
This European Standard specifies a method of
determining the swelling in thickness of
flat-pressed or drum-pressed particleboards,
fibreboards, and cement-bonded particleboards
2 Normative references
This European Standard incorporates by dated or
undated reference, provisions from other
publications These normative references are cited
at the appropriate places in the text and the
publications are listed hereafter For dated
references, subsequent amendments to or revisions
of any of these publications apply to this European
Standard only when incorporated in it by
amendment or revision For undated references the
last edition of the publication referred to applies
EN 325, Wood-based panels — Determination of
dimensions of test pieces
EN 326-1, Wood-based panels — Sampling, cutting
and inspection
EN 326-1, Sampling and cutting of test pieces and
expression of test results1)
3 Principle
Swelling in thickness is determined by measuring
the increase in thickness of the test piece after
complete immersion in water
4 Apparatus
4.1 Micrometer
Micrometer, according to EN 325.
4.2 Water bath
A thermostatically controlled water bath, capable of
maintaining a temperature of (20 ± 1) °C and in
which the test pieces can be maintained in the
conditions specified in 6.2.
5 Test pieces
5.1 Sampling
Sampling and cutting of the test pieces shall be
carried out according to EN 326-1
5.2 Dimensions
The test pieces shall be square with a side length
of (50 ± 1) mm
5.3 Conditioning
The test pieces shall be conditioned to constant mass in an atmosphere with a mean relative humidity of (65 ± 5) % and a temperature
of (20 ± 2) °C Constant mass is considered to be reached when the results of two successive weighing operations, carried out at an interval of 24 h, do not differ by more than 0,1 % of the mass of the test piece
6 Procedure
6.1 Thickness measurement
The thickness of each test piece shall be measured to
an accuracy of ± 0,01 mm at the intersection of the diagonals, according to EN 325 (Figure 1)
6.2 Immersion
Immerse the test pieces with their faces vertical in clean, still water, having a pH of 7 ± 1 and a temperature of (20 ± 1) °C This temperature shall
be maintained throughout the test period During the test, the test pieces shall be separated from each other and from the bottom and the sides of the water bath The upper edges of the test pieces shall be covered by (25 ± 5) mm of water throughout the test The water shall be changed after each test The immersion times shall be as specified by the individual standards for the different board types
6.3 Further procedure
After the immersion time has elapsed, take the test pieces out of the water, remove excess water and
measure the thickness of each test piece (6.1).
1) At present in the draft stage.
Figure 1 — Test piece for the measurement
of swelling in thickness
Trang 84 © BSI 07-1999
7 Expression of results
7.1 For each test piece
The swelling in thickness of each test piece, Gt,
expressed as a percentage of original thickness shall
be calculated according to the following formula:
Swelling in thickness shall be expressed to one
decimal
7.2 For a board
The swelling in thickness of a board is the
arithmetic mean of the results of all test pieces
taken from that board and shall be expressed in
percentage, to one decimal
8 Test report
According to EN 326-1
Additionally: The results of this test, including the
time of immersion
where
t1 is the thickness of the test piece before
immersion, in millimetres;
t2 is the thickness of the test piece after
immersion, in millimetres
Gt t2–t1
t1
-×100
=
Trang 9EN 317:1993
Annex A (informative)
Bibliography
EN 300, Particleboards: Oriented Strand Boards (OSB)2)
EN 309, Wood particleboards — Definition and classification
EN 312-2, Particleboards — Specifications — Part 2: Requirements for general purpose boards2)
EN 312-3, Particleboards — Specifications — Part 3: Requirements for boards for use in interior fitments
(including furniture) in dry conditions2)
EN 312-4, Particleboards — Specifications — Part 4: Requirements for load-bearing boards for use in dry
conditions2)
EN 312-5, Particleboards — Specifications — Part 5: Requirements for load-bearing boards for use in
humid conditions2)
EN 312-6, Particleboards — Specifications — Part 6: Requirements for heavy-duty load-bearing boards for
use in dry conditions2)
EN 312-7, Particleboards — Specifications — Part 7: Requirements for heavy-duty load bearing boards for
use in humid conditions2)
EN 316, Wood fibreboards — Definition, classification and symbols
EN 622-2, Fibreboards — Specifications — Part 2: Requirements for hardboards2)
EN 622-3, Fibreboards — Specifications — Part 3: Requirements for medium boards2)
EN 622-4, Fibreboards — Specifications — Part 4: Requirements for softboards2)
EN 622-5, Fibreboards — Specifications — Part 5: Requirements for dry process fibreboards2)
EN 633, Cement-bonded particleboards — Definition and classification2)
EN 634-1, Cement-bonded particleboards — Specifications — Part 1: General requirements2)
2) At present in the draft stage.
Trang 11BS EN 317:1993
© BSI 07-1999
National annex NA (informative)
Committees responsible
The United Kingdom participation in the preparation of this European Standard was entrusted by the Technical Sector Board for Building and Civil Engineering (B/-) to Technical Committee B/541, upon which the following bodies were represented:
American Plywood Association
Association of British Plywood and Veneer Manufacturers
British Woodworking Federation
Chartered Institute of Building
Coordinator for Timber and Timber Products
Council of the Forest Industries of British Columbia
Department of the Environment (Timber Division, Building Research Establishment)
Fibre Building Board Organisation (FIDOR)
Finnish Plywood International
Flat Roofing Contractors Advisory Board
Forestry Commission
Furniture Industry Research Association
Institution of Structural Engineers
National Federation of Roofing Contractors
National Housebuilding Council
National Panel Products Association
Royal Institute of British Architects
Timber Research and Development Association
Timber Trade Federation
United Kingdom and Ireland Particleboard Association
Coopted member
National annex NB (informative)
Cross-reference
Publication referred to Corresponding British Standard
EN 325:1993 BS EN 325:1993 Wood-based panels — Determination of dimensions of test pieces
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